198290401 has 2 divisors, whose sum is σ = 198290402. Its totient is φ = 198290400.

The previous prime is 198290381. The next prime is 198290461. The reversal of 198290401 is 104092891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103734225 + 94556176 = 10185^2 + 9724^2 .

It is a cyclic number.

It is not a de Polignac number, because 198290401 - 2⁵ = 198290369 is a prime.

It is not a weakly prime, because it can be changed into another prime (198290461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99145200 + 99145201.

It is an arithmetic number, because the mean of its divisors is an integer number (99145201).

Almost surely, 2^198290401 is an apocalyptic number.

It is an amenable number.

198290401 is a deficient number, since it is larger than the sum of its proper divisors (1).

198290401 is an equidigital number, since it uses as much as digits as its factorization.

198290401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 198290401 is about 14081.5624488194. The cubic root of 198290401 is about 583.1324778600.

The spelling of 198290401 in words is "one hundred ninety-eight million, two hundred ninety thousand, four hundred one".